JFK's $9.5 Billion New Terminal One Slips to Early 2027, Nine Airlines Left Waiting
A second delay for New York's biggest airport project
New Terminal One, the $9.5 billion project rising on the site of JFK International Airport's old Terminal 3, will not open in 2026 as its developers had promised. The terminal operator confirmed in the past week that the first phase of the facility is now targeted for the first quarter of 2027, the second time the opening date has slipped after an original 2026 target was set when construction broke ground in 2022.
The delay affects nine international airlines that had been preparing to relocate their JFK operations into the new building, including Air France, KLM, Etihad Airways, LOT Polish Airlines, EVA Air, Turkish Airlines, Air New Zealand, Air China and Philippine Airlines. Those carriers currently operate out of a mix of aging terminals at JFK, some of which date to the 1960s.
According to the terminal operator, the delay is not attributed to a single structural or financial setback but to the scale of testing required before the facility can safely handle passengers, baggage and international connections at full volume. "We want to ensure that all systems and processes are well-tested and prepared to deliver on our commitment to set a new standard in customer experience, from day one," a New Terminal One spokesperson said, according to reporting this week.
What the terminal will look like when it opens
New Terminal One is being built in two phases. The first phase, now expected to open in early 2027, will include 13 permanent gates plus one temporary gate. A second phase will add nine more gates, bringing the eventual total to 23, of which 22 will be widebody-capable — a critical detail for a terminal designed primarily to host long-haul international carriers flying twin-aisle aircraft like the Boeing 787, Airbus A350 and Boeing 777.
The completed terminal will span roughly 2.6 million square feet, making it one of the largest single terminal buildings in the New York region. More than 300,000 square feet of that space is allocated to retail, dining and airline lounges, including six lounges in total, among them a flagship Air France lounge. The roof will carry roughly 13,000 solar panels, which developers describe as the largest solar installation at any airport in New York City, part of a broader push to lower the terminal's operating carbon footprint compared with the facilities it replaces.
The project is structured as a public-private partnership, financed and built by a consortium that includes airport developer and operator groups working under a long-term lease with the Port Authority of New York and New Jersey, which owns JFK. At $9.5 billion, it remains the largest airport public-private partnership ever undertaken in the United States, a scale that has made its construction schedule a closely watched bellwether for how airports finance and deliver megaprojects without direct government capital budgets.
Why it keeps slipping
The terminal's timeline has moved more than once since groundbreaking. The original plan called for opening in 2026, and as recently as earlier this year developers were still describing a 2026 target for the first gates to go live. That target has now been formally pushed into the first quarter of 2027, with the operator citing the need for exhaustive systems testing — baggage handling, security screening integration, jet bridge and gate systems, and the software that ties passenger processing together — before any airline can begin operating flights out of the building.
Large terminal projects of this scale routinely encounter schedule pressure between substantial completion and the point where an airport authority and airline tenants agree the facility is ready for live passenger operations. Unlike a runway or cargo facility, a passenger terminal cannot open with partial systems; security, life-safety, and airline operational systems all have to pass certification and live testing simultaneously, and a slip in any one of them cascades into the overall date. New Terminal One's own messaging has consistently framed the delay in those terms rather than pointing to a shortage of funding or a construction failure.
The project has also created substantial employment tied directly to its build-out: developers estimate approximately 10,000 jobs connected to the project, including about 6,000 union construction positions during the peak of the build. Those numbers have been part of the project's public case since its inception, positioning it as an infrastructure and jobs story as much as an aviation one.
Why it matters for JFK and the airlines involved
JFK has spent the past several years in the midst of a broader $19 billion airport-wide redevelopment that also includes new international arrivals facilities and renovated terminals elsewhere on the airfield. New Terminal One is the single largest piece of that overhaul, intended to replace the outdated Terminal 3 that closed in 2020 and to consolidate a cluster of foreign flag carriers who had been operating out of terminals not designed for modern widebody aircraft or today's passenger volumes.
For the nine airlines waiting to move in, the delay means at least a few more months of operating out of interim facilities at JFK — arrangements that were always understood to be temporary but that now stretch longer than originally budgeted internally by those carriers' JFK station operations. None of the airlines has publicly announced schedule disruptions tied to the delay, and the shift affects where flights arrive and depart within JFK rather than whether they operate at all.
For the Port Authority and for New York's broader push to modernize its airports — a campaign that has already delivered a rebuilt LaGuardia and new international arrivals capacity elsewhere at JFK — the terminal's schedule has become one of the most visible tests of whether the region's biggest infrastructure bets can hit their public promises. A first-quarter-2027 opening would put the project roughly a year behind the original 2026 target, a gap that is not unusual for a project of this complexity but one that will draw scrutiny given the project's size and its position as a model for future US airport public-private financing deals.
Phase two, adding the remaining nine gates to bring the terminal to its full 23-gate footprint, does not yet have a confirmed date beyond the general timeline developers have described since the project's launch, and will depend on how smoothly the first phase's opening and initial months of operations go.
The interim terminals carriers are stuck with
Several of the nine airlines waiting on New Terminal One currently operate out of Terminal 4 or shared space in other JFK buildings under interim arrangements negotiated when Terminal 3 closed in 2020. Those interim setups were designed as bridge solutions, with gate space, lounge access and baggage handling capacity generally tighter than what the airlines' schedules and aircraft sizes call for. A longer bridge period means airlines absorb more months of those constraints, including limits on how many widebody flights they can efficiently turn around during peak banks, before they get the larger, purpose-built gates New Terminal One is designed to offer.
None of the affected carriers has indicated the delay will change how many flights they operate to New York, and the shift is entirely about which terminal building passengers use at JFK rather than route networks or aircraft assignments. Still, for carriers like Air France and KLM, which plan to anchor major lounge investments in the new terminal as part of broader long-haul product upgrades, the delay pushes back the debut of amenities they had been promoting to premium customers as part of the New York experience.
How it compares with other US megaprojects
New Terminal One's schedule slippage puts it in familiar company among recent large US airport builds. LaGuardia's roughly $8 billion rebuild, completed over multiple phases through the back half of the 2010s and into the 2020s, also saw phase-by-phase openings stretch beyond initial targets as the airport authority balanced live operations with ongoing construction on adjacent gates. Denver International Airport's terminal renovation and several other US hub modernization projects have followed similar patterns, where the final testing and commissioning phase — rather than the structural construction itself — tends to be where schedules slip most.
What sets New Terminal One apart is less the delay itself than the project's financing structure and scale. As the largest airport public-private partnership in US history, it was conceived partly as a model for how large hub airports can fund major capital projects without drawing directly on Port Authority or federal capital budgets, instead relying on a consortium of private developers, airlines and institutional investors operating under a long-term lease. A visible schedule slip on a project of this size and prominence will likely factor into how airport authorities and financiers structure the next wave of US terminal projects, several of which — including work planned at other major hubs — are being watched partly as tests of whether the public-private model can deliver on time.
What comes next
New Terminal One's operator says it is now finalizing construction and working through testing and readiness exercises with its airline and concession partners ahead of the new target window. Airport watchers will be looking for a firmer date as the opening window approaches, along with confirmation of which of the nine relocating carriers will be first to move their JFK operations into the building once it does open. The second phase, which will bring the terminal to its full 23-gate footprint, remains further out on the horizon and will likely not get a firm date until the operator has some track record from the first phase's opening months.